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Classic, Vintage & Veteran For Coventry and Meriden Models. Anything pre-Hinckley goes.

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Old 11-01-2012, 12:47 PM   #1 (permalink)
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HELP!! 1972 Restoration First Start up problems

Hey guys. First, I want to say I have used your experiences to build a pretty bad ass bike. Thanks.

Now to business. I have restored a 1972 t100sc. The engine worked when I took the bike apart, so I didn't crack open the cases or anything. I just changed gaskets around the primary and the outer clutch cover.

The problem is when I crank over the engine, I get (I think gear case oil) oil pouring out of what seems to be small gear the chains hooked to. It doesn't leak oil when sitting, just when I crank over the engine. It's not a small leak either?? HELP!!!

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Old 11-01-2012, 01:00 PM   #2 (permalink)
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Old 11-01-2012, 02:05 PM   #3 (permalink)
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Hard work isn't it.

The oil leak is not stopping the bike from running.

Make sure you are getting a good spark on both plugs.

If they are dry after you have kicked it over a few times, they are not getting fuel.

This will then point you in the right direction.

BEWARE! There could be more than one thing stopping this bike from running.

Don't worry - you'll get there.
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Old 11-01-2012, 03:05 PM   #4 (permalink)
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First, go get yourself a pair of boots or hard soled shoes. Kicking that thing with sneakers is not good for your feet.

Second stop kicking that bike on the sidestand. They are not meant for that. Kick it with the bike resting on the tires and no stands.

Third, unless you put aftermarket carbs on the bike with accelerator pumps, twisting the throttle before you start it does absolutely nothing. You've been watching too many Harley riders.

My opinion on why the bike is not starting is you are not getting enough gas. It's hard to see from the vid, but it appears that you are tickling it, which floods the engine a bit and right after that she fires and runs for a few seconds. That tells me it is running out of gas.

I also notice that you only tickle one carb. Do them both. Both cylinders need gas.

It might want to be choked. If you still have the chokes installed, use them. My T140V will not start unless I choke it, tickled or not. Your's could be the same.

If you have no chokes, then you may have to tickle it excessively to get her to run.

You might not be getting any fuel thru the idle circuit.
You might also have your throttle slides closed down so far that it is not getting enough air/fuel. Open them up a bit. You can always lower them if the idle is too high.
Or, you may be opening up the throttle when it starts and that is killing it. Try leaving the throttle alone and see if she will start and settle into an idle before you start to whack open the throttle. If she is not getting enough gas, opening the throttle does not help.

regards,
Rob
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Old 11-01-2012, 08:07 PM   #5 (permalink)
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I agree on all points - my TR7 behaved exactly the same after I pressure washed it just after I bought it. Water got into the carb and I had to keep tickling it liberally, then it would run on the excess gas and die, just like yours is doing. I did this until it drew all the water through and then it was fine, but I don't think yours is to do with water, more like lack of fuel for some other reason.

The fact that it fires at all is a good sign. It seems to be kicking back, which may mean the ignition timing is too advanced - you could try retarding it a bit, that might make it easier to start.
Please treat that sidestand kinder! If you kick it over on the tyres only, and without your other foot on the left footrest, you'll get a better swing at it.
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Old 11-01-2012, 08:56 PM   #6 (permalink)
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Quote:
The problem is when I crank over the engine, I get (I think gear case oil) oil pouring out of what seems to be small gear the chains hooked to. It doesn't leak oil when sitting, just when I crank over the engine. It's not a small leak either??
Gearbox oil has a pungent odor to it and can easily be distinguished from motor oil.

"Small gears and chains"- what exactaly are you describing here?

Nice looking bike,

What are the bike's DNA?

Battery
Ignition
Carb's
more history might help here.

Three kicks at the most should get it running!

One kick if it's set up good!
Good Luck.
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Old 11-01-2012, 10:15 PM   #7 (permalink)
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WoW Thanks guys!!! I am a complete novice, but almost intermediate. This was my dad's bike. The original engine was stolen by some scumbag my dad had work on it years ago. The engine is a 1966 T100sc in a 1972 t100 frame. It has only 1 carb and a 2 into 1 intake manifold. It has an amal 626 carb with only 2 adj. screws on 1 side of carb. 1 for the idle, at a 45 degree angle. And the other is horizontal. I replaced both o-rings on those screws. Cleaned out the 180 jet, but I think there might be 1 more jet inside I didn't see. It seems like it wants to fire. I agree, something with my fuel settings.

A bigger concern is the oil that leaks when I crank it over. It's a lot of oil!! I think gear case but I don't know. you can see the puddle grow under the bike in the video.
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Old 11-01-2012, 10:17 PM   #8 (permalink)
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It has a Joe Hunt Magneto!!!! Tympanium rectifier (+), battery, a headlamp and a tail lamp.




Last edited by SteveForbes; 11-01-2012 at 10:30 PM.
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Old 11-02-2012, 07:42 AM   #9 (permalink)
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A couple of observations.
The throttle cable should be in the front hole.
(*unless the top is on backwards)
Yours is in the choke hole.
If a choke is not fitted, the hole should be blanked-off.



I dont know the correct jetting for your set-up, but if its supposed to have an air filter, the main jet needs to be larger.
Which carb is fitted?
The frame may be 1972 but the engine is an earlier type. [pre unit]
Lack of fuel!
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Old 11-02-2012, 08:01 AM   #10 (permalink)
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are you sure that's a pre unit Caulky?

looks like a unit 500 to me
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